Machine for making tubular strainers.



' Patented Dec. 23, I902.

J. H. me. I MACHINE FOR MAKING TUBULAR STRAINEBS.

(Application filed. Nov. 15, 1901.) (No Model. 2 Shear-Shoot l.

m en STATES PATENT OFFICE.

JOHN H. KING, OF OOVINGTON, KENTUCKY, ASSIGNOR OF ONE-HALF TO THE KISINGER-ISON COMPANY, OF CINCINNATI, OHIO, A CORPORA- TION OF OHIO.

WIACHINE FOR MAKING TUBULAR STRAINERS.

SPECIFICATION forming part of Letters Patent N 0. 716,555, dated December 23, 1902.

Application filed November 15 1901. $erial No. 82,472. (No model.)

T0 to 1072/07 it may concern:

Be it known that I, JOHN H. KING, a citizen of the United States of America, and a resident of Oovington, in the county of Kenton and State of Kentucky, have invented certain new and useful Improvements in Machines for Making Tubular Strainers, of which the the following is a specification.

The object of my invention is a machine for making a tubular strainer from a continuous wire. The means whereby I attain this object are described in the specification and illustrated in the accompanying drawings, in which- Figure 1 is a view in side elevation of a machine embodying my invent-ion. Fig. 2 is an enlarged transverse sectional view of the same, taken upon line 0c 00 of Fig. 1. Fig. 3 is a detail end View of my mandrel with the clamping-cap removed from the end thereof. Fig. 4 is a detail plan view of the cap for holding the parts of the mandrel together, showing its interior taper. Fig. 5 is an enlarged detail view, partlyin side elevation and partly in longitudinal section, of my mandrel. Fig. 6 is a detail perspective view of a tubular strainer made upon my machine. Fig. 7 is a sectional detail view of the same, taken upon line 2 z of Fig. 6.

Strainer 0, made upon the machine embodying my invention, consists of a continuous wire 0, wound spirally into a tubular cylinder, leaving a narrow uniform slit between the spirals, which are bound together by interior transverse bars 0, soldered or brazed to them.

In my machine wire 0 is wound upon a collapsible mandrel A, which is held between the head and tail stocks 1) and b, respectively, of a lathe B from a spool 6 which is journaled upon a reciprocating carriage 5 which is mounted upon lathe-bed Z2 Carriage b is reciprocated by a feed-screw b journaled in brackets upon the side of the lathe-bed and geared to the headstock by gearing which keeps the rate of rotation of the feedscrew and of the spindle of the head-stock such that a narrow uniform slit is left between the spirals.

In going from spool b to mandrel A wire 0 passes through a wire-straightener I), likewise mounted upon the carriage b Mandrel A is divided longitudinally into four sections a, a a and a, which when placed together fit snugly about a square shaft or spindle a and upon the exterior form a cylinder. Sections a and a are in cross- .section that of an isosceles triangle whose base is of the same width as shaft a and whose apex is cut off by the periphery of the cylinder, sections a and a being similar and of the shape of a cylinder with sections 0. and a andshaft a cut out. Sections a, a a and a are tapered upon both ends, which are engaged by clampingcaps a and o of the same circumference as the mandrel, with longitudinal grooves similar to those of the mandrel and tapered upon the interior of, similarlyto the ends of sections a, a a and 0. so that when nuts a a are screwed down against said caps the sections are held firmly together and that when the nuts are removed the caps may be easily slipped olf, shaft a pulled out, and the mandrel collapsed. I prefer to have the mandrel externally screw-threaded to assist in keeping the spirals spaced properly, but its surface may be left smooth. After the wire has been wound upon the mandrel its end is clamped to the mandrel, which is then removed from the lathe. Transverse bars 0 are then pushedinto the longitudinal grooves in the mandrel beneath the spirals and are soldered or otherwise secured to the spirals. The nuts and clamping-caps are then removed from the ends of the mandrel, when upon knocking upon the ends of shaft 01 it is easily withdrawn and the mandrel collapses.

WVhat I claim is- 1. In combination with a lathe, a collapsible mandrel upon which to wind a spiral strainer mounted between the head and tail stocks, a spool for wire mounted upon the reciprocating carriage, and suitable gearing coupling the feed-screw of the carriage and the spindle of the head-stock to produce a predetermined distance between the spirals, substantially as shown and described.

2. A collapsible cylindrical mandrel upon which to wind wire, having longitudinal grooves to receive bars transverse to the spito form a cylinder longitudinally grooved ex rals of the wire, substantially as shown and teriorly and tapered upon both ends to engage described. caps, caps tapered interior-1y to engage the I5 3. 'A mandrel upon which to wind wire, ditapers and having longitudinal grooves to 5 vided longitudinally into collapsible sections register with the aforesaid grooves, and nuts and having longitudinal grooves upon its ex- 1 to engage the shaft and hold the caps in enterior and having means for holding the sec gagement with the sections, substantially as tions in place While the Wire is being wound shown and described. thereon, substantially as shown and de- 10 scribed.

JOHN H. KING. Witnesses:

4. A mandrel consisting of longitudinal W. F. MURRAY, sections to fit together about an interior shaft 1 EMMA LYFORD. 

